1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
# Copyright (C) 2011-2014 Aleksey Lim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from sugar_network.db.metadata import indexed_property, Localized
from sugar_network.db.metadata import Numeric, List, Authors
from sugar_network.db.metadata import Composite, Aggregated
from sugar_network.toolkit.coroutine import this
from sugar_network.toolkit.router import ACL
class Resource(object):
"""Base class for all data classes."""
#: `Metadata` object that describes the document
metadata = None
def __init__(self, guid, record, cached_props=None):
self.props = cached_props or {}
self.guid = guid
self.is_new = not bool(guid)
self.record = record
self._post_seqno = None
@property
def post_seqno(self):
return self._post_seqno
@post_seqno.setter
def post_seqno(self, value):
if self._post_seqno is None:
self._post_seqno = value
self.post('seqno', value)
@indexed_property(Numeric, slot=1000, prefix='RS', acl=0)
def seqno(self, value):
return value
@indexed_property(Numeric, slot=1001, prefix='RC', default=0, acl=ACL.READ)
def ctime(self, value):
return value
@indexed_property(Numeric, slot=1002, prefix='RM', default=0, acl=ACL.READ)
def mtime(self, value):
return value
@indexed_property(Authors, prefix='RA', default={}, full_text=True,
acl=ACL.READ)
def author(self, value):
return value
@indexed_property(List, prefix='RL', default=[])
def layer(self, value):
return value
@layer.setter
def layer(self, value):
orig = self['layer']
if 'deleted' in value:
if this.request.method != 'POST' and 'deleted' not in orig:
self.deleted()
elif this.request.method != 'POST' and 'deleted' in orig:
self.restored()
return value
@indexed_property(List, prefix='RT', full_text=True, default=[])
def tags(self, value):
return value
@property
def exists(self):
return self.record is not None and self.record.consistent
def deleted(self):
pass
def restored(self):
pass
def get(self, prop):
"""Get document's property value.
:param prop:
property name to get value
:returns:
`prop` value
"""
prop = self.metadata[prop]
value = self.props.get(prop.name)
if value is None and self.record is not None:
meta = self.record.get(prop.name)
if meta is not None:
value = meta.get('value')
else:
value = prop.default
self.props[prop.name] = value
return value
def properties(self, props):
result = {}
for i in props:
result[i] = self.get(i)
return result
def meta(self, prop):
if self.record is not None:
return self.record.get(prop)
def diff(self, seq):
for name, prop in self.metadata.items():
if name == 'seqno' or prop.acl & ACL.CALC:
continue
meta = self.meta(name)
if meta is None:
continue
seqno = meta.get('seqno')
if seqno not in seq:
continue
value = meta.get('value')
if isinstance(prop, Aggregated):
value_ = {}
for key, agg in value.items():
if agg.pop('seqno') in seq:
value_[key] = agg
value = value_
meta = {'mtime': meta['mtime'], 'value': value}
yield name, meta, seqno
def patch(self, props):
if not props:
return {}
patch = {}
for prop, value in props.items():
if self[prop] == value:
continue
orig_value = self[prop]
if orig_value and isinstance(self.metadata[prop], Localized):
for lang, subvalue in value.items():
if orig_value.get(lang) != subvalue:
break
else:
continue
patch[prop] = value
return patch
def post(self, prop, value, **meta):
prop = self.metadata[prop]
if prop.on_set is not None:
value = prop.on_set(self, value)
if isinstance(prop, Aggregated):
for agg in value.values():
agg['seqno'] = self.post_seqno
if isinstance(prop, Composite):
old_value = self[prop.name]
if old_value:
old_value.update(value)
value = old_value
self.record.set(prop.name, value=value, seqno=self.post_seqno, **meta)
self.props[prop.name] = value
def _set(self, prop, value):
self.props[prop] = value
def __contains__(self, prop):
return prop in self.props
def __getitem__(self, prop):
return self.get(prop)
|
